* It's a misspelling: Could you double-check the spelling? Perhaps it's "miran" or something similar.
* It's a regional word: It might be a dialectal term or a word specific to a certain community or culture. Can you provide any context about where you heard this word?
* It's a made-up word: It's possible it's a fictional term or a unique word within a specific story or context.
Please provide more information so I can help you understand the meaning of "mirang."